Allouis transmitter
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Allouis transmitter
Emetteur d'Allouis
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| Basic data | |||||||||||||
| Place: | Allouis | ||||||||||||
| Department: | Cher | ||||||||||||
| Region: | Center-Val de Loire | ||||||||||||
| Country: | France | ||||||||||||
| Altitude : | 350 m | ||||||||||||
| Coordinates: 47 ° 10 ′ 25 ″ N , 2 ° 12 ′ 16.5 ″ E | |||||||||||||
| Use: | Civil | ||||||||||||
| Accessibility: | Transmission system not accessible to the public | ||||||||||||
| Owner : | TDF | ||||||||||||
| Data on the transmission system | |||||||||||||
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| Send type: | Long wave broadcasting | ||||||||||||
| Position map | |||||||||||||
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The transmitter Allouis near Allouis ( Département Cher ) had been the central radio transmitter for long and short wave of the French radio since 1939 .
history
In 1936, planning began for a powerful long-wave transmitter in central France. Then the Allouis transmitter was built and put into operation in July 1939. It replaced the long wave transmitter in St. Rémy. With a transmission power of 2 × 450 kW, Allouis was the most powerful transmitter in the world for several years. An antenna system consisting of four lattice masts was used until it was destroyed in 1944 by the withdrawing German troops.
On October 19, 1952, a new long-wave transmitter with an output of 250 kW went into operation in Allouis. He used three special fish trap antennas as antennas , which were suspended from a 308 meter high guyed steel framework mast.
In 1957 the transmission power was increased to 600 kW, 1974 to 1000 kW and 1981 to 2000 kW. However, it was only broadcast at full power during the day. In 1974 the antenna system was rebuilt. The trap antennas were removed and the transmitter mast was raised to a height of 350 meters. In addition, a second 350-meter-high mast was erected to better cover France.
At the turn of the year 2016/2017, the broadcast of the France Inter program on long wave 162 kHz was stopped. However, the distribution of time signals is continued by the same transmitter with reduced transmission power because these are used by over 200,000 devices in France.
Time signal transmitter
Since 1977, the station in Allouis (transmission frequency 162 kHz) has not only been used to broadcast the France Inter radio program , but also to broadcast time signals using the AMDS method with the TDF station.
The carrier frequency of the transmitter is derived from an atomic clock located in the station building. It is therefore a calibration frequency .
Web links
- France-Inter transmitter masts. In: Structurae
- http://perso.wanadoo.fr/tvignaud/am/allouis/fr-allouis.htm
Individual evidence
- ↑ Long wave transmitters in Norway, France, Sweden, Great Britain, Poland, Denmark, Finland. Retrieved August 5, 2019 .
- ^ The signal horaire restera sur le 162 kHz de France Inter . In: La Lettre Pro de la Radio & des Médias . December 21, 2016 (French).